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https://www.readbyqxmd.com/read/28432972/assessment-of-the-bioavailability-and-depuration-of-uranium-cesium-and-thorium-in-snails-cantareus-aspersus-using-kinetics-models
#1
B Pauget, A Villeneuve, P O Redon, A Cuvier, A de Vaufleury
Uranium ore waste has led to soil contamination that may affect both environmental and soil health. To analyze the risk of metal transfer, metal bioavailability must be estimated by measuring biological parameters. Kinetic studies allow taking into account the dynamic mechanisms of bioavailability, as well as the steady state concentration in organisms necessary to take into account for relevant risk assessment. In this way, this work aims to model the snail accumulation and excretion kinetics of uranium (U), cesium (Cs) and thorium (Th)...
April 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28431380/recent-aspects-of-uranium-toxicology-in-medical-geology
#2
REVIEW
Geir Bjørklund, Olav Albert Christophersen, Salvatore Chirumbolo, Olle Selinus, Jan Aaseth
Uranium (U) is a chemo-toxic, radiotoxic and even a carcinogenic element. Due to its radioactivity, the effects of U on humans health have been extensively investigated. Prolonged U exposure may cause kidney disease and cancer. The geological distribution of U radionuclides is still a great concern for human health. Uranium in groundwater, frequently used as drinking water, and general environmental pollution with U raise concerns about the potential public health problem in several areas of Asia. The particular paleo-geological hallmark of India and other Southern Asiatic regions enhances the risk of U pollution in rural and urban communities...
April 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28431363/nanomaterial-based-electrochemical-sensors-for-arsenic-a-review
#3
REVIEW
Sureshkumar Kempahanumakkagari, Akash Deep, Ki-Hyun Kim, Suresh Kumar Kailasa, Hye-On Yoon
The existence of arsenic in the environment poses severe global health threats. Considering its toxicity, the sensing of arsenic is extremely important. Due to the complexity of environmental and biological samples, many of the available detection methods for arsenic have serious limitations on selectivity and sensitivity. To improve sensitivity and selectivity and to circumvent interferences, different electrode systems have been developed based on surface modification with nanomaterials including carbonaceous nanomaterials, metallic nanoparticles (MNPs), metal nanotubes (MNTs), and even enzymes...
April 13, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28431318/assessing-seasonal-variation-of-synthetic-musks-in-beach-sands-from-oporto-coastal-area-a-case-study
#4
Vera Homem, Inês Magalhães, Arminda Alves, Lúcia Santos
Synthetic musk compounds are widely used in the formulation of several cosmetics, personal care and household products. Due to their massive and widespread use, together with some health concerns, they are considered emerging pollutants and have been detected in different environmental compartments. This study focused on the evaluation of the concentration of synthetic musks (five nitro, five polycyclic and one macrocyclic musks) in beach sands, from Oporto coastal area (Portugal), contributing to the enhancement of the knowledge of levels, trends and behaviour of these compounds in this particular matrix...
April 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28428686/aflatoxins-implications-on-health
#5
REVIEW
Usha P Sarma, Preetida J Bhetaria, Prameela Devi, Anupam Varma
Environmental occurrence of Aspergillus and other fungal spores are hazardous to humans and animals. They cause a broad spectrum of clinical complications. Contamination of aflatoxins in agri-food and feed due to A. flavus and A. parasiticus result in toxicity in humans and animals. Recent advances in aspergillus genomics and aflatoxin management practices are encouraging to tackle the challenges posed by important aspergillus species.
June 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28427632/ultrasonic-treatment-of-cofe2o4-b2o3-sio2-as-a-new-hybrid-magnetic-composite-nanostructure-and-catalytic-application-in-the-synthesis-of-dihydroquinazolinones
#6
Ali Maleki, Morteza Aghaei, Hamid Reza Hafizi-Atabak, Mohammad Ferdowsi
New hybrid magnetic composite nanostructure are prepared via ultrasonic treatment by glass-ceramic method, characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), energy-dispersive X-ray (EDX), element distribution image (EDX mapping), thermal gravimetric analysis (TGA)/differential thermal analysis (DTA) and N2 adsorption-desorption by Brunauer-Emmett-Teller (BET) analyses. Then, the catalytic activity of the prepared CoFe2O4@B2O3-SiO2 nanoparticles was tested in the synthesis of 2-substituted-3-(phenylamino)-dihydroquinazolin-4(1H)-ones in deep eutectic solvent (DES) based on choline chloride as an eco-friendly and recyclable media...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28426988/solar-photocatalytic-application-of-nbo2oh-as-alternative-photocatalyst-for-water-treatment
#7
Luana Márcia Bezerra Batista, Alexsandro Jhones Dos Santos, Djalma Ribeiro da Silva, Ana Paula de Melo Alves, Sergi Garcia-Segura, Carlos Alberto Martínez-Huitle
Water recycling and industrial effluents remediation are a hot topic of research to reduce the environmental impact of the human activity. Persistent organic pollutants are highly recalcitrant compounds with hazardous effects associated to their fate in water bodies. Several novel technologies have been developed during the last decades to deal with this novel contamination. However, the natural sources and idiosyncrasy of each country lead to the potential application of different technologies. In this context, we have focused on the development of phocotalytic treatment of solutions containing dyes using a novel photocatalytic material, the NbO2OH...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28425998/drivers-of-salamander-extirpation-mediated-by-batrachochytrium-salamandrivorans
#8
Gwij Stegen, Frank Pasmans, Benedikt R Schmidt, Lieze O Rouffaer, Sarah Van Praet, Michael Schaub, Stefano Canessa, Arnaud Laudelout, Thierry Kinet, Connie Adriaensen, Freddy Haesebrouck, Wim Bert, Franky Bossuyt, An Martel
The recent arrival of Batrachochytrium salamandrivorans in Europe was followed by rapid expansion of its geographical distribution and host range, confirming the unprecedented threat that this chytrid fungus poses to western Palaearctic amphibians. Mitigating this hazard requires a thorough understanding of the pathogen's disease ecology that is driving the extinction process. Here, we monitored infection, disease and host population dynamics in a Belgian fire salamander (Salamandra salamandra) population for two years immediately after the first signs of infection...
April 19, 2017: Nature
https://www.readbyqxmd.com/read/28425113/environmental-perfluorooctane-sulfonate-exposure-drives-t-cell-activation-in-bottlenose-dolphins
#9
Adam C Soloff, Bethany Jacobs Wolf, Natasha D White, Derek Muir, Sean Courtney, Gary Hardiman, Gregory D Bossart, Patricia A Fair
Perfluoroalkyl acids (PFAAs) are highly stable compounds that have been associated with immunotoxicity in epidemiologic studies and experimental rodent models. Lengthy half-lives and resistance to environmental degradation result in bioaccumulation of PFAAs in humans and wildlife. Perfluorooctane sulfonate (PFOS), the most prevalent PFAA detected within the environment, is found at high levels in occupationally exposed humans. We have monitored the environmental exposure of dolphins in the Charleston, SC region for over 10 years and levels of PFAAs, and PFOS in particular, were significantly elevated...
April 19, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28425070/h-emibagrus-sp-as-a-potential-bioindicator-of-hazardous-metal-pollution-in-selangor-river
#10
Nor Shahirul Umirah Idris, Kah Hin Low, Isa Baba Koki, Ahmad Firdaus Kamaruddin, Kaharudin Md Salleh, Sharifuddin Md Zain
The spatial distributions of Na, Mg, K, Ca, Cr, Fe, Ni, Cu, Zn, As, Se and Pb in Hemibagrus sp. from Selangor River and a reference site were determined with inductively coupled plasma-mass spectrometer, in comparison to the levels in their surrounding water body and sediments. The results demonstrated significant differences in elemental accumulation pattern in different fish tissues originated from both sites. The variations observed were mainly subjected to their metabolic activities, and also the influence of the surrounding medium...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28424754/considerations-of-temperature-in-the-context-of-the-persistence-classification-in-the-eu
#11
Michael Matthies, Sabine Beulke
Simulation degradation studies for industrial chemicals, biocidal products and plant protection products are required in the EU to estimate half-lives in soil, water and sediment for the comparison to persistence criteria for hazard (P/vP) assessment, and for use in exposure assessments. There is a discrepancy between European regulatory approaches regarding the temperature at which degradation half-lives should be (1) measured in simulation degradation testing of environmental compartments, and (2) compared to the P/vP criteria...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/28422598/the-use-of-restorative-materials-in-primary-molars-among-pediatric-dentists-in-israel
#12
Sigalit Blumer, Benjamin Peretz, Tal Ratson
OBJECTIVES: To assess the current choice of various restoration materials among Israeli pediatric dentists according to seniority and specialty. STUDY DESIGN: Participating dentists completed a 23-item questionnaire on their qualifications, type of practice and preference of restorative material. RESULTS: Seventy-five dentists (average age 46.27±12.6 years, 58 females) participated. Forty-one were specialist pediatric dentists and 34 were general practitioners...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28418198/stress-is-associated-with-an-increased-risk-of-recurrent-seizures-in-adults
#13
Elisa Baldin, W Allen Hauser, Alison Pack, Dale C Hesdorffer
OBJECTIVE: The literature is sparse on the complex interrelationships between stressors, depression, anxiety disorders, and epilepsy. We hypothesized that a relationship exists between stress and epilepsy. We evaluated whether markers of stress are associated with seizure recurrence in a low income community-based cohort of adults with single unprovoked seizure or newly diagnosed epilepsy. METHODS: We ascertained adult residents of Northern Manhattan and Harlem, New York City, with a first unprovoked seizure or newly diagnosed epilepsy, between December 2010 and January 2013...
April 18, 2017: Epilepsia
https://www.readbyqxmd.com/read/28414022/cigarette-smoking-and-the-risks-of-basal-cell-carcinoma-and-squamous-cell-carcinoma
#14
J C Dusingize, C M Olsen, N P Pandeya, P Subramaniam, B S Thompson, R E Neale, A C Green, D C Whiteman
Sunlight is the principal environmental risk factor for keratinocyte cancers, but other carcinogens have also been implicated, including tobacco smoke. Findings have been conflicting however. We investigated associations between cigarette smoking and incidence of BCC or SCC in QSkin, a prospective study of skin cancer (n=43,794). Smoking history was self-reported at baseline; newly diagnosed BCCs and SCCs were ascertained through data linkage and verified by histopathology reports. We restricted analyses to white participants who at baseline reported no past history of skin cancer excisions and no more than 5 destructively-treated actinic skin lesions...
April 13, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28413712/variation-within-mbp-gene-predicts-disease-course-in-multiple-sclerosis
#15
Yuan Zhou, Steve Simpson, Jac C Charlesworth, Ingrid van der Mei, Robyn M Lucas, Anne-Louise Ponsonby, Bruce V Taylor
OBJECTIVE: Prognosis following a first demyelinating event is difficult to predict, with no genetic markers of MS progression currently identified. Myelin basic protein (MBP) is a major component of the myelin sheath of CNS neurons and may play a central role in demyelinating diseases such as MS. However, genetic variation in MBP has not been implicated in MS onset risk in large genome-wide association studies. We hypothesized that genetic variations in MBP may be a determinant of MS clinical course...
April 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28412630/phenol-remediation-by-peroxidase-from-an-invasive-mesquite-turning-an-environmental-wound-into-wisdom
#16
Savita Singh, Ruchi Mishra, Radhey Shyam Sharma, Vandana Mishra
The present study examines mesquite (Prosopis juliflora), an invasive species, to yield peroxidase that may reduce hazards of phenolics to living organisms. As low as 0.3U of low-purity mesquite peroxidase (MPx) efficiently remove phenol and chlorophenols (90-92%) compared with Horseradish peroxidase (HRP) (40-60%). MPx shows a very high removal efficiency (40-50%) at a wide range of pH (2-9) and temperature (20-80°C), as opposed to HRP (15-20%). At a high-level of the substrate (2.4mM) and without the addition of PEG, MPx maintains a significant phenolic removal (60-≥92%) and residual activity (∼25%)...
April 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28412622/population-production-pollution-nexus-based-air-pollution-management-model-for-alleviating-the-atmospheric-crisis-in-beijing-china
#17
X T Zeng, Y F Tong, L Cui, X M Kong, Y N Sheng, L Chen, Y P Li
In recent years, increscent emissions in the city of Beijing due to expanded population, accelerated industrialization and inter-regional pollutant transportation have led to hazardous atmospheric pollution issues. Although a number of anthropogenic control measures have been put into use, frequent/severe haze events have still challenged regional governments. In this study, a hybrid population-production-pollution nexus model (PPP) is proposed for air pollution management and air quality planning (AMP) with the aim to coordinate human activities and environmental protection...
April 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28411563/spatio-temporal-trends-in-fire-weather-in-the-french-alps
#18
S Dupire, T Curt, S Bigot
The Alpine area is particularly sensitive to climatic and environmental changes that might impact socio-ecosystems and modify the regime of natural hazards. Among them, wildfire is of major importance as it threatens both ecosystems and human lives and infrastructures. Wildfires result from complex interactions between available vegetation fuels, climate and weather, and humans who decide of the land use and are the main source of fire ignitions. The changes in fire weather during the past decades are rather unknown in the French Alps especially due to their complex topography...
April 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28411499/characteristics-and-environmental-fate-of-the-anionic-surfactant-sodium-lauryl-ether-sulphate-sles-used-as-the-main-component-in-foaming-agents-for-mechanized-tunnelling
#19
REVIEW
Anna Barra Caracciolo, Martina Cardoni, Tanita Pescatore, Luisa Patrolecco
The anionic surfactant sodium lauryl ether sulphate (SLES) is the main component of most commercial products used for soil conditioning in the excavation industry, in particular as lubricants for mechanized tunnelling. Its use during the excavation processes can result in either the subsequent possible re-use of the huge amount of soil debris as by-products (e.g. land covering) or its discharge as waste. Currently, there are neither SLES soil threshold limits in European legislation, nor comprehensive studies on the environmental risk for soil ecosystems in these exposure scenarios...
April 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28409764/using-the-narratives-of-ontarians-with-a-work-related-traumatic-brain-injury-to-inform-injury-prevention-a-mixed-methods-approach
#20
Vanessa Amodio, Heather Bruch, Tatyana Mollayeva, Angela Colantonio
BACKGROUND: Work-related traumatic brain injury (wrTBI) is the most significant occupational injury associated with death and disability. Few studies have investigated injury text narratives to inform prevention strategies. OBJECTIVE: To identify factors leading to wrTBI in male and female workers utilizing the Person-Environment-Occupation (P-E-O) framework. METHODS: A retrospective chart review of the medical records of 98 consecutive Ontario workers with a diagnosed wrTBI was performed...
April 12, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
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